package com.yang;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldPrepender;
import io.netty.handler.codec.bytes.ByteArrayDecoder;
import io.netty.handler.codec.bytes.ByteArrayEncoder;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import io.netty.util.CharsetUtil;

import java.util.logging.Logger;


public class TcpServer {
  private static final Logger logger = Logger.getLogger(TcpServer.class.getName());
  private static final String IP = "127.0.0.1";
  private static final int PORT = 9999;
  /**用于分配处理业务线程的线程组个数 */
  protected static final int BIZGROUPSIZE = Runtime.getRuntime().availableProcessors()*2; //默认
  /** 业务出现线程大小*/
  protected static final int BIZTHREADSIZE = 4;
  private static final EventLoopGroup bossGroup = new NioEventLoopGroup(BIZGROUPSIZE);
  private static final EventLoopGroup workerGroup = new NioEventLoopGroup(BIZTHREADSIZE);
  protected static void run() throws Exception {
    ServerBootstrap b = new ServerBootstrap();
    b.group(bossGroup, workerGroup);
    b.channel(NioServerSocketChannel.class);
    b.childHandler(new ChannelInitializer<SocketChannel>() {
      @Override
      public void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline pipeline = ch.pipeline();
//        ByteBuf byteBuf = Unpooled.copiedBuffer(new byte[]{(byte) 0X96});
//        pipeline.addLast("framer",new DelimiterBasedFrameDecoder(10000,byteBuf));
        pipeline.addLast(new LengthFieldEncoder());
        pipeline.addLast(new IotDecoder());
//        pipeline.addLast(new CustomEncoder());
        pipeline.addLast(new TcpServerHandler());
      }
    });

    b.bind(IP, PORT).sync();
    logger.info("TCP服务器已启动");
  }

  protected static void shutdown() {
    workerGroup.shutdownGracefully();
    bossGroup.shutdownGracefully();
  }

  public static void main(String[] args) throws Exception {
    logger.info("开始启动TCP服务器...");
    TcpServer.run();
//    TcpServer.shutdown();
  }
}





